Chronic toxicity and oncogenicity study on acrylamide incorporated in the drinking water of Fischer 344 rats

Toxicology and Applied Pharmacology
K A JohnsonR W Mast

Abstract

Male and female Fischer 344 rats were maintained on treated drinking water providing dosages of 0 (controls), 0.01, 0.1, 0.5, or 2.0 mg acrylamide/kg body wt/day for 2 years to assess the chronic toxicity and oncogenic potential of the chemical. The mean body weights of male and female rats receiving 2.0 mg/kg/day and of male rats receiving 0.5 mg/kg/day were minimally decreased when compared with controls. During the last 4 months of the study, there was an increase in mortality among male and female rats receiving 2.0 mg/kg/day. A target organ effect, characterized by degeneration of peripheral nerves, was observed in rats receiving 2.0 mg/kg/day. The incidence of several tumor types was increased in the rats receiving 2.0 mg/kg/day when compared with controls. In females, increased tumor incidences were observed in the mammary gland, central nervous system, thyroid gland-follicular epithelium, oral tissues, uterus, and clitoral gland. In males the incidence of tumors of the thyroid gland-follicular epithelium and scrotal mesothelium was increased. Male rats receiving 2.0 mg/kg/day also had increased incidence of central nervous system tumors when compared to historical controls but not when compared to concurrent controls. T...Continue Reading

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